Power-fan.



N9. 874,805. PATENTED DEC. 24, 1907.

J. 0. STINE.

POWER'FAN. APPLIOATION FILED JAN. 21, 1907.

annex-Lion;

,. Fans of the class JOSEPH e i'TINE, or OSOEOLA MILLS, rnnnsvtvinm.

rowan-Fan.

Specification of Letters Patent.

Patenteti Dec. 24%, 19 E".

Application filed January 21. 1907. Serial Ilox 353.272.

To all whom it may concern:

Be it known that I, JOSEPH O. STINE, of Osceola Mills, in the county of Clearfielcl, State of Pennsylvania, have invented certain new anti useful 1m rovements in Power- Fans, of which the ollowing is a speci fica tion.

The object of my invention is to, produce improvements in power fans for the ventila tion of mines, for example, or similar pur; poses. I r v referred to are/neces sarily of large dimensions to accomn'ioditt them to the work required of them, thediametc! of the fans proper ranging from say'five feet to sixteen feet.

In fans of the class and size suggested, par-- ticularly when running at a high rate 0 speed, the strain upon the vanes is a heavy one requiring special provision to be made to protect the vanes from shearing away the olts, or similar means for securing the vanes to their hub. It is with this fact in view that my invention is to provide improved and secure means for attaching the vanes of a fan to its hub.

In the accompanying drawing, which con stitutes apart of this application, Figure I is a perspective view of a fan embodying my invention. Fig. II is an elevation of the an proper, shown in Fig.1 and detached from its supporting and actuating mcchan: ism. Fig. III is a perspective View showing a portion of a vane, axial support, and shaft embodying my invention. Fig. IV is a perspective view of the vane and hub connecting member.

Referring to the numerals on the drawing, 1 indicates the bed-plate of my fanfupon. which is carried a bench 2 for the support of a motor 3, geared to a shaft 4 that is carried in suitable bearings on supp irting-members 6 and 7 arranged upon opposite sides of a casing 8, the supporting-member 6 being, for compactness of assemblage, mounted upon the top of the bench 2, upon which it is bolted. Upon the shaft 4, within the casing. 8, is carried the fan proper, which-consists of a series of vanes 10, a wheel or hub 1, and braces 12. I

My invention consists in improved means of attaching the vanes to the wheel or hub, and comprehends.essentially a projection 15, titted and countersunk into one of a series of when the fan is in motion.

recesses 16,.preferably radial, angular in cross section, and upon one side oi the hub, of which one is provided in the wheel or hub ii for each vane comprised in the fan proper. The projection 15, being snugly fitted and countersunk into its recess 16, may be secured by a series of screws 17. The triIlCQ of 3 the screws is to hold the vane snugly into pol w sition but not to receive an shearin strain l. a r) from the drive of the vane through the air all such strain spends itseli against the side walls of the recess. By this arrangement, a strong, rugged, curable, and rigid construction is arrived at.

I prefer to make the projection 15 a part of a vane and hub uniting member, shown. in detail in Fig. iV. It consists of the projection 15 and a vane-plate 18, the two being integrally united sl ioulder 1.9. The shoulder may he made 1 or triangular shape so as to impart a cant to i the plate 18 with respect to the projection 15, thereby lending to the vane, which, as by bolts or rivets 20, is secured to the vane-plate 18, the desired inclination.

(in the contrary,

by an intermediate bendor '1. In a power fan, the combination with hub provided with a series of radial. recesses, of vanes disposed about said hub axis, and a vane and hub uniting member for each vane, consisting of a projection upon one end, fitting within a recess in the hub, and a plate upon the other end secured to the vane, and an intermediate shoulder, whereby the. le-= sired inclination with respect to the d1 may be imparted to the vane.

2. In a power ran, the combination with hub provided. with a series of radial angular recesses, of vanes disposed about said hub as an axis, and a vane-and-huhaunting-member for ear-h vane compr sing projection, an intermediate shoulder, and a .ilatc, said projection and intermediate s. .iulder fitting within a recess in the hub, and said plate being secured to the vane, substantially as described.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

' JQQEPH C. STINE.

l 1 What I claim is: l l l l l Witnesses A. W. BAiRD, J. S. Carneanan. 

